how do u know a girl likes you by signs? (im a girl too)?

Question

I have a classmate that likes to touch my hair like for instance, yesterday, her arms are literally resting on my back while touching my hair. she's done this a couple of times and only to me. also, she always rest her head on my shoulders saying she is tired. (like today she rested her head on my shoulders 3 times saying how tired she is) she also loves to touch my arms and like play around with it.
when we talk to each other there is this awkward tension between us and we feel shy towards each other. she keeps teasing me in everything.

also, when she did my vitals i was so nervous and my pulse reading was like on 128...then when i did her's was 108. we were both above normal. when i was putting the blood pressure cuff on her arm she felt very shy and quiet. i dunno

when i asked her about our teacher being gay...she seemed quiet and her face was serious. i think she got uncomfortable about that topic. she didnt even answer my question.

im bi and i don't know if she is...im not out

she does feel shy whenever we are the only 2 talking and its a bit awkward. but when we are with other people she always teases and laugh on what I do...when ever i make a joke she always laughs and sometimes i feel her eyes on me.

like earlier, we were feeding our residents and i was making faces with the residents and entertaining them...she was always laughing at what i was doing and she always looks at me while i was entertaining the resident. she acts really different...when i pick on her or tease her she like blushes and laughs a lot. when she laughs she always like covers her mouth and blushes... i think that she was flirting with me a lot...i dunno if my friends notice it because it was only me and her laughing.

Answer 1

Very simple. Signals and body language and also behavior in the person.